Please carefully investigate my document: Relationship Time Evaluation and Payroll
I have configured to resolve complicated requirement:
In customer system there is an Absence Type - Sick Leave. Annually Sick Leave total will impact employee's salary as below:
| 1 | From 01 -> 15 days | FULL salary | ||
| 2 | From 16 -> 25 days | 75% salary | ||
| 3 | From 26 -> 35 days | 50% | ||
| 4 | From 36 -> 45 days | 25% | ||
| 5 | above 45 days | 0% |
After deeply understand it, you can do it by yourself 
Hope it's helpful!
Regards!
Woody